Naplex calculation

[coolmist528]

Hi all ,

Can you please help me in soving the problem?

Find out the amount of zinc sulfate needed in the rx?

Aq.sol. zinc sulfate 0.5%
Aq.sol. boric acid 1.0% aa-10 ml
Normal saline sol.qs ad- 30 ml

Answer: 50 mg

Thanks.
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[hems]

Hi,
In the question they have given aq zinc sulphate soln and aq boric acid solution aa 10 ml which means of each 10 ml.So calculate aq zinc solution 0.5% in 10 ml
100 ml contains 0.5 gms of zinc sulphate
Then 10 ml contains 0.05 gms of zinc sulphate(0.05 gms is same as 50 mg which is the answer)

[coolmist528]

Hi all ,

another problem , can anyone please solve this one

How many ml of low alcohol elixir (10%) and high alcohol elixir (78%) must be mixed for the following Rx:

codiene phosphate : 0.4 g
Alcohol elixir 38% - 50 ml
Pur.water qs - 100 ml

thanks...

Hi hems,

Thanks for thy reply , but i have doubt why isnt Normal saline considered while calculating and only boric soln vol is considered?

Thanks

Hi hems,

Thanks for thy reply , but i have doubt why isnt Normal saline considered while calculating and only boric soln vol is considered?

Thanks

[anna5]

hi
in the first problem,
30 ml of final pdt contains only 10 ml of znso4,so just need to find amt of zn in 10ml

no need to worry about the qty of other 2 ing

[Nicli]

You need to do alligations for this problem:

78| | 28
| 38 |
10| | 40
68 total

so basically you need 28 parts of the 78%, and 40 parts of the 10% to get 68 parts of the 38%.

28mL/68mL x 50mL= 20.6mL of the 78%
40mL/68mL x 50mL= 29.4mL of the 10%

Hope this is right.
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[RBC]

Hi Nicli,

That's perfect buddy.
Keep it up.